Is increased radiation use efficiency in sorghum related to increased height?

George-Jaeggli, Barbara, Broad, Ian, Hammer, Graeme and Jordan, David (2004). Is increased radiation use efficiency in sorghum related to increased height?. In: T. Fischer, N. Turner, J. Angus, L. McIntyre, M. Robertson, A. Borrell and D. Lloyd, New Directions for a Diverse Planet: Proceedings of the 4th International Crop Science Congress. 4th International Crop Science Congress, Brisbane, Australia, (1-5). 26 September-1 October 2004.


Author George-Jaeggli, Barbara
Broad, Ian
Hammer, Graeme
Jordan, David
Title of paper Is increased radiation use efficiency in sorghum related to increased height?
Conference name 4th International Crop Science Congress
Conference location Brisbane, Australia
Conference dates 26 September-1 October 2004
Proceedings title New Directions for a Diverse Planet: Proceedings of the 4th International Crop Science Congress
Place of Publication Gosford, N.S.W., Australia
Publisher The Regional Institute
Publication Year 2004
Sub-type Fully published paper
ISBN 1 920842 20 9
1-920842-21-7
Editor T. Fischer
N. Turner
J. Angus
L. McIntyre
M. Robertson
A. Borrell
D. Lloyd
Volume CD
Start page 1
End page 5
Total pages 5
Collection year 2004
Language eng
Formatted Abstract/Summary
Sorghum yield is known to correlate with height in breeding populations and some recent studies have found enhanced radiation use efficiency (RUE) in a tall (single dwarf) sorghum hybrid, which may explain the correlation. The experiments reported in this paper were undertaken to investigate whether plant height per se was related to radiation use efficiency in sorghum. Two field experiments were conducted with mutant lines differing only in one height gene – conventional triple dwarfs and their mutated (taller) double dwarfs. In experiment 1, a significant increase in biomass due to higher RUE was observed for the tall mutant in one genetic background but not in the other. In experiment 2, however, the same genotype showed significantly increased biomass with the tall mutant form, but this was caused by enhanced light interception rather than difference in RUE. Hence, at this stage it was not possible to draw a clear conclusion about the possible relationship between RUE and height in sorghum. The question remains unresolved and is the subject of on-going study.
Subjects E1
340299 Applied Economics not elsewhere classified
720399 International trade issues not elsewhere classified
Keyword Near-isogenic
Reverse mutation
Light interception
Single-gene
Dw3
Q-Index Code E1

 
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Created: Thu, 23 Aug 2007, 20:03:37 EST